Perhaps unfortunately for you, some spitting spiders are very commonly found indoors. We used to regularly see them cruising around in our Entomology building office and fed them curly-wing Drosopila to see their spitting in action.

I don’t recall ever hearing about social spiders until a couple days ago, browsing through your pictures as it happens. I can’t believe I’d never heard of them but they are exactly the kind of thing I would remember forever, as far as I know.